No abstract available
Publication types
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Research Support, U.S. Gov't, P.H.S.
MeSH terms
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Animals
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Drug Implants
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Kinetics
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Male
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Morphine / administration & dosage*
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Naloxone / pharmacology
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Rats
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Reinforcement, Psychology
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Reward
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Self Administration
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Tegmentum Mesencephali / drug effects*
Substances
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Drug Implants
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Naloxone
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Morphine